Machine for and method of making plaster-board



C. R. BIRDSEY. MACHINE FOR AND METHOD OF MAKING PLASTER BOARD;

' APPLICAHON FILED JAN,2. I920.

1,383 55, PatentedJune 28,1921.

2 SHEETSSHEET 1.

C. R. BIRDSEY.

MACHINE FOR AND METHOD OF MAKING PLASTER BOARD..

APPLICATION FILED JAN. 2, 1920.

1,383,255. 7 Patented June28, 1921.

2 SHEETSSHEET 2.

UNITED STATES PATENT OFFICE.

CHARLES R. BIRDSEY, F HINSDALE, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, 'IO'UNITED STATES GYPSUM COMPANY, OF CHICAGO, ILLINOIS, A. COBJEORATION OI ILLDTOIE.

MACEINEFOR AND METHOD KAKIN'G PLASTER-BOABD.

Specification of Letters Iatent. Patented J 28; 192

Application filed January 2, 1920. Serial No. 348,939.

To all whom it may concern:

Be it known that I, CHARLES R. BmDsEY,

a citizen of the United States, residing at Hinsdale, in the county of Dupage, and State of Illinois, have invented certain new and useful Improvements in Machines for and Methods of Making Plaster-Board, of which the following is a description.

My invention relates to the method and to that general class of devices known as machines for making plaster board or the like, and has among its objects an improved method and the production of a machine of the kind described that is simple, convenient, durable, efiicient, and satisfactory for use wherever found applicable, which will produce an improved board of the kind de scribed. Many other objects and advantages of the method and construction herein shown and described will be obvious to those skilled in the art from the disclosure herein given.

To this end my invention consists in the novel method, construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like or corresponding parts,

Figure 1 is a longitudinal sectional view through my improved machine, I

Fig. 2 is a sectionalview taken substantially on line 2-2 of Fig. 1,

Fig. 3 is a sectional view taken tially on line 3-3 of Fig. 1,

Fig. 4 is a sectional view taken substantially on line 4--4 of Fig. 1,

Fig. 5 is a sectional view taken substantially on line 5-5 of Fig. 1,

Fig. 6 is a perspective view of a portion of the board manufactured on the machine, and in accordance with method, and

Fig. 7 is a sectional view of a portion of a similar board showing a slightly different arrangement of the parts. a

substan- Referring to the drawings, 1t may be men tioned that the type of board which this maframe 3. A sheet 4 of paper or other suitable material is fed onto the conveyor from a supply roll 5, the same, however, preferably passing under the scoring wheels 6 or the equivalent arranged to score the sheet a at the points where the same is to be folded. As shown, the sheet 1 extends over and is supported by the conveyer 1, suitable provision belng made for discharging stucco, plaster, or other plastic material 9 on the same.

As shown, a conveyer 10 is provided, the same receiving the stucco and discharging it 1n a plastic state onto the sheet a. I have not considered it necessary to illustrate herein the conveyer 10 in detail, nor the preparation of the plastic material, as this forms no part of the present invention, but it may be said, however, that the stucco or the equivalent, and other ingredients, if desired, may be mixed on the conveyer or its equivalent in any suitable manner with water or the like and thence discharged onto the sheet 4.

At each side of the table, adjacent the corn veyer 1, is a member 8, the same being arranged to engage the edges 1 of the sheet and fold or turn the same up at the scoring marks and maintain the same in the turned up position. I provide rolls 11 and 12 preferably arranged as shown. The upper roll 12 is arranged between the side bars 8, the construction of the parts being such, however, that there is a space 17 between the end of the roll and the inner side of the edge 4 of the sheet, so that some of the material may flown upon the side of the sheet. A cover sheet 15, of paper or the equivalent, from a supply roll 16 is passed over and under the roll 12, as shown, and forms one of the covering sheets of the finished board.

After the sheet 15 is applied on the stucco,- the edges 4 of the sheet 4 are folded in or turned over and upon the same. purpose I show turning members 17 which engage the upturned edges 4 and fold or turn them over and down as indicated in Fig. 1. These folding members are arranged in advance of the rolls 18 and 19, which rolls are preferably so arranged as to even and age the thickness of the board so as to pro uce a uniform product. They are generally set so that the edges 4' are de ressed flush with the face of the board.

A or passing the rolls 18 and 19, the same For this i driving shaft 22.

It will be noted by referring to Fig. 3,

that as the board is passed between the rolls 11 ad 12, a portion of the material may be sgueezed out into the space between the ends 0 the rolland the inner side of the upturned edge ofpaper or covering sheet. This provides a seal for the turned over sheet, as will be seen by referring to Fig. 6, in which the portion of the material between the end 15 of one cover sheet and the. edge '4' of the other cover sheet seals the two sheets together.

It'will be seen that after scoring the board cover sheet I hold up the edges of the sheet and apply the stucco, then apply the second cover sheet and press the same in the first sheet so as to properly set the same in place and then I apply or cause a portion of stucco to flow upon the upturned edges and then turn the edges down on the top sheet and press them 1nto place.

- In Fig. 7 the cover sheet 24 is shown turned over as at 25 over the top sheet 26, the edge of which 27 extends as shown. In this case the material 28 between the edges 27 and 2 5 seals the same. In this particular illustration the edge 27 is substantially parallel with the ed e 25 instead of slightly inclined as shown in ig. 6. The ap earance of the resulting product, however, rom the exterior is substantiall the same, and the utility the same. I wis it to be understood that while both edges are preferably foldedover or inclosed the board may be constructed with only one edge so. inclosed.

Having thus described my invention, it is obvious that various immaterial modifications may be made in the same without departln from the spirit of my invention; hence do not wish to be understood as lim iting myself to the exact form, construction, arrangement and combination of parts herein shown and described, or uses mentioned.

What I claim as new and desire to secure by Letters Patent is v 1. In a machine of the kind described and 1n combination, a conveyer, means for supplylng the cover sheet of suitable material thereto, means for folding up the edges of the sheet and maintaining the same turned plp, means for depositing a plastic body onopposite ed es, means for turning the edges up, means or depositing a plastic body on the sheet, means for applying a second cover sheet over said plastic body and between the edges of the first sheet, means for thereafter turning said upturned edges in over the second cover sheet, and means for pressing the same down on the sheet.

3. In a machine of the kind described and in combination, a movable conveyer, means means for depositing a suitable plastic body on a sheet, means for applying a. second cover sheet over said plastic body and between the upturned edges of the first sheet, means for thereafter folding said upturned edges inwardly over the second cover sheet, means for pressing the same down on the sheet, and means for straightening the edges.

4. In a machine of the kind described and in combination, means for supplying a cover sheet of suitable material thereto, means for scoring said sheet adjacent the opposite edges, means for folding up the edges, means for depositing a plastic body on the sheet, a roll arranged above said sheet and spaced therefrom, said roll extending between said folded edges, but of a lengt whereby the ends of the roll are spaced from the said folded edges, means for feeding a second cover sheet extended over said roll, means for folding down said ed es, after said sheets and plastic material be y have passed said roll and a second roll arranged to press said folded over edges'down on the second sheet whereby a portion of the plastic material is forced over the edges of the second cover sheet and between the sheet and said folded over edges and the sheets secured together.

5. In a machine of the kind described and in combination, means for supplying a cover sheet of suitable material thereto, means for folding u the edges, meansfor depositing a plastic Body on the sheet, a 'roll arranged above said sheet and spaced therefrom, said roll extending between said edges, but of a length whereby the ends of the roll are spaced from the said upturned edges a distance sufficient to permit the plastic material to flow upth'e edges, means for feedi a second coversheet extended over said ro l? means for' folding down said edges after said sheets and plastic material body have passed said rolls and a second roll arranged to press said folded over edges down on the second sheet whereby a portion of the plastic material on the edges is forced over the face of the second cover sheet between the sheet and said folded over edges.

6. A. method of constructingplaster board consisting in providing a cover sheet and folding up the edges of the cover sheet and applying a plastic material thereon between the upturned edges, thence applying a top cover sheet and pressing the same down on the plastic material, thence folding the said edges of the first sheet down on the second cover sheet, and pressing the edges down to the said sheet and secure the same together.

7. A method of constructing plaster board consisting in folding up the edges of a cover sheet and applying a plastic material thereon between the upturned edges, thence applying a top cover sheet and pressing the same down on the plastic material, providing: a surplus of material at said upturned edges, thence folding the upturned edges down on the face of the secondcover sheet and said surplus material, and pressing the edges down on the surplus material and the said second sheet whereby the two sheets are substantially secured together by the surplus material between the two.

8. A method of constructing plaster board consisting in folding up the edges of a cover sheet and applying a plastic materialthereon between the upturned edges, thence applying a top cover sheet on said plastic material and pressing the sameon the plastic material causing the surplus material to flow out at the edges of the second cover sheet, thence folding in the upturned edges of the first mentioned sheet over on the second mentioned cover sheet and pressing the same down on the Second sheet whereby the surplus material flows between the two sheets and substantially seals the same.

9. A method of constructing plaster board consisting in folding up the edges of a cover sheet and applying a plastic material thereon between the upturned edges, thence applying a top cover sheet on the same and pressing the same on the plastic materialsigned my name in the presence of two subscribing witnesses;

' CHARLES R. B-IRDSEY.

Witnesses:

. ROY W., HILL,

Cams 1. Cone. 

